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Simplifying -7(4 + -7b) = 28 + -7b (4 * -7 + -7b * -7) = 28 + -7b (-28 + 49b) = 28 + -7b Solving -28 + 49b = 28 + -7b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '7b' to each side of the equation. -28 + 49b + 7b = 28 + -7b + 7b Combine like terms: 49b + 7b = 56b -28 + 56b = 28 + -7b + 7b Combine like terms: -7b + 7b = 0 -28 + 56b = 28 + 0 -28 + 56b = 28 Add '28' to each side of the equation. -28 + 28 + 56b = 28 + 28 Combine like terms: -28 + 28 = 0 0 + 56b = 28 + 28 56b = 28 + 28 Combine like terms: 28 + 28 = 56 56b = 56 Divide each side by '56'. b = 1 Simplifying b = 1
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